Collective-field acceleration of high-energy ions
A collective-field accelerator, evolving from experimental and theoretical research, uses a high-vacuum diode with an adjustable graphite cathode, as well as an insulated anode, and operates with a relativistic electron beam with $nu$$/$$gamma$ of approximately 1. Alternate gradient lenses are used to focus collectively accelerated particles. The gradients are produced by alternate dielectric and grounded lenses. The dielectric lenses are self charged by the electron beam, creating a potential difference in reference to the grounded lenses. These lenses focus both electrons and ions by convective processes. Deuterons were accelerated in pulses of approximately 10$sup 14$, producing up to 10$sup 11$ D-D neutrons per burst by impingement on suitable targets. Hydrogen, deuterium, carbon, fluorine, and chlorine ions were accelerated to produce both light- and heavy-ion reactions. Analysis of activation data shows that heavy ions with greater than 6 MeV per nucleon and protons with approximately 15 MeV energy were produced. Theoretical analysis indicates that the collective ion acceleration mechanisms arise from interactions with plasma-wave trains which are created by near-resonant, beam-cavity interactions and which are accelerated (in group velocity) through density and temperature gradients in the secondary plasma beyond the anode. (auth)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- NSA Number:
- NSA-33-001437
- OSTI ID:
- 4141661
- Report Number(s):
- UCRL-76953; CONF-741178-1
- Resource Relation:
- Conference: Conference on energy storage, compression and switching, Torino, Italy, 5 Nov 1974; Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Development & Operation
430100* -Particle Accelerators-Design
Development & Operation
*COLLECTIVE ACCELERATORS- BEAM PRODUCTION
ANODES
BEAM DYNAMICS
CARBON
CATHODES
CHLORINE
DESIGN
DEUTERON BEAMS
DIELECTRIC MATERIALS
ELECTRON BEAMS
ELECTROSTATIC LENSES
FLUORINE
PROTON BEAMS
RELATIVISTIC RANGE